Obama: "We will find out who did this"

President Barack Obama, responding to the explosions at the Boston Marathon, says the United States does not know "who did this or why" but vowed that whoever is responsible "will feel the full weight of justice."

http://www.wtsp.com/video/2303337776001/1496577165001/Obama-We-will-find-out-who-did-thishttp://bcdownload.gannett.edgesuite.net/wtsp/35087134001/35087134001_2303392667001_th-516c8104e4b035461132ad3a-1592194026001.jpg?pubId=35087134001Obama: "We will find out who did this"President Barack Obama, responding to the explosions at the Boston Marathon, says the United States does not know "who did this or why" but vowed that whoever is responsible "will feel the full weight of justice."Boston MarathonnationalwtspNewsObama03:13